1. Condemnation and Diplomatic Actions:
The United States strongly condemned Germany's invasion of Poland and the aggressive actions taken by the Nazi regime. The U.S. government publicly expressed its disapproval and concern over Germany's violation of international law and the sovereignty of Poland.
2. Neutrality Act:
At the time, the United States had a policy of neutrality, as per the Neutrality Acts passed in the 1930s. These acts aimed to prevent the U.S. from becoming directly involved in foreign conflicts. However, public sentiment in the U.S. was shifting towards supporting the Allied powers against Germany's aggression.
3. Economic Measures:
The U.S. implemented economic measures against Germany in response to its invasion of Poland. The Roosevelt administration invoked the Neutrality Act of 1939, which prohibited the export of arms and certain materials to belligerent nations. This measure was intended to put economic pressure on Germany and limit its ability to wage war.
4. Support for the Allied Powers:
Although the U.S. remained officially neutral at the start of the war, it began providing material support to the Allied forces, particularly Great Britain and France. This support included the "Cash and Carry" policy, which allowed the Allies to purchase arms, ammunition, and other supplies on a "pay-as-you-go" basis.
5. Lend-Lease Act:
In March 1941, the United States passed the Lend-Lease Act, which significantly increased its support to the Allies. Under this legislation, the U.S. provided war materials, resources, and equipment to nations whose defense was deemed vital to the security of the United States. Great Britain and other Allied nations received billions of dollars worth of aid through the Lend-Lease program.
6. Public Opinion:
The invasion of Poland and the unfolding events in Europe galvanized public opinion in the United States. Many Americans sympathized with the Allied cause and believed that the U.S. should do more to oppose the spread of fascism. This sentiment contributed to the growing calls for intervention and eventual involvement in the war.
In summary, while the U.S. did not immediately engage in military action against Germany after its invasion of Poland, it took various diplomatic, economic, and political steps to express its disapproval and provide support to the Allied powers. These actions reflected a shift in U.S. policy and public sentiment towards increased involvement in the war against Nazi Germany.